Heating of 2,2-dioxoisothiazolo[5,4,3-d,e]quinolines (available from 3-nitroanilines in a simple three-step synthesis) with an excess of bis-functionalized methylene CH acids in the presence of K2CO3 as a base afforded 1H-benzo[i,j][2,7]naphthyridines in good yields.
在 K2CO3 作为碱的存在下,用过量的双官能化亚甲基 CH 酸加热 2,2-二氧代
异噻唑并[5,4,3-d,e]
喹啉(通过简单的三步合成法从 3-
硝基苯胺中获得),可以得到 1H-苯并[i,j][2,7]
萘啶,收率很高。